/OPTIONS=options

    Optional. Defaults: NOEIGHT_BIT, HEADERS, NORELAY.

    The following SMTP options are available:

    o  [NO]EIGHT_BIT

       All characters must have the eighth bit clear. Allows the
       transmission of 8-bit characters.

    o  Header control. Specify one of the following:

       HEADERS       Headers are printed at bottom of messages.
       NOHEADERS     Headers are omitted.
       TOP_HEADERS   Headers are printed at top of messages.
       NOTOP_        Resets TOP_HEADERS to the default.
       HEADERS

    o  [NO]RELAY

       Relays mail to other hosts by functioning as an end node.